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Stash courier stats #34

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Stash courier stats #34

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31 changes: 31 additions & 0 deletions src/message.lisp
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Original file line number Diff line number Diff line change
Expand Up @@ -143,6 +143,36 @@ NOTE: \"RTS\" is short for \"Return To Sender\".")
(error "I don't know how to route."))
destination)))

(defvar *courier-debug-table*)
(setf (documentation '*courier-debug-table* 'variable)
"Bind this with an EQUAL hash-table to collect COURIER usage statistics.")

(defgeneric courier-stash-debug-info (courier intermediate-destination time-to-deliver message)
(:documentation "Called by COURIER's default object handler. Stashes statistical usage info.")
(:method ((processing-courier courier) intermediate-destination time-to-deliver message)
;; if we're not debugging, skip.
(when (boundp '*courier-debug-table*)
(destructuring-bind (destination-courier-id destination-mailbox . payload) message
(declare (ignore destination-mailbox payload))
;; record immediate hop
(incf (gethash (list ':intermediate-destination
(courier-id processing-courier)
(courier-id intermediate-destination))
*courier-debug-table*
0))
;; record the ultimate destination
(incf (gethash (list ':final-destination
(courier-id processing-courier)
destination-courier-id)
*courier-debug-table*
0))
;; record how deep the queue is
(incf (gethash (list ':queue-depth
(courier-id processing-courier)
(q-len (aether::courier-queue processing-courier)))
*courier-debug-table*
0))))))

(defun send-message (destination payload)
"Sends the message `PAYLOAD' to be received at `DESTINATION', an `ADDRESS'. Returns the `REPLY-CHANNEL' of the `PAYLOAD', if any."
(check-type destination address)
Expand Down Expand Up @@ -253,6 +283,7 @@ NOTES:
(courier-courier->route courier (first message))
(setf time-to-deliver (or time-to-deliver
(courier-default-routing-time-step courier)))
(courier-stash-debug-info courier intermediate-destination time-to-deliver message)
(schedule courier (+ now (/ (courier-processing-clock-rate courier))))
(schedule (ignorant-lambda
(deliver-message intermediate-destination message))
Expand Down